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Title: Equation of state for QCD at finite temperature and density. Resummation versus lattice data

The perturbative series for finite-temperature field theories has very poor convergence properties and one needs a way to reorganize it. In this talk, I review two ways of reorganizing the perturbative series for field theories at finite temperature and chemical potential, namely hard-thermal-loop perturbation theory (HTLpt) and dimensional reduction (DR). I will present results for the pressure, trace anomaly, speed of sound, and the quark susceptibilities from a 3-loop HTLpt calculation and for the quark susceptibilities using DR at four loops. A careful comparison with available lattice data shows good agreement for a number of physical quantities.
Authors:
 [1] ; ;  [2] ;  [3] ;  [4]
  1. Department of Physics, Norwegian University of Science and Technology, N-7491 Trondheim (Norway)
  2. Theory Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata-700064 (India)
  3. Department of Physics, Kent State University, Kent, Ohio 44242 (United States)
  4. Fakultät für Physik, Universität Bielefeld, 33615 Bielefeld (Germany)
Publication Date:
OSTI Identifier:
22499010
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1701; Journal Issue: 1; Conference: 11. conference on quark confinement and hadron spectrum, Saint Petersburg (Russian Federation), 8-12 Sep 2014; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPARATIVE EVALUATIONS; CONVERGENCE; DENSITY; EQUATIONS OF STATE; PERTURBATION THEORY; QUANTUM CHROMODYNAMICS; QUARKS; SOUND WAVES; VELOCITY